package com.ce.server.controller;

import com.google.code.kaptcha.impl.DefaultKaptcha;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;

/**
 * @DATE: 2021/11/14 18:08
 * @Author: 小爽帅到拖网速
 */
@RestController
public class CaptchaController {

  @Autowired
  private DefaultKaptcha defaultKaptcha;

  @ApiOperation(value = "验证码接口")
  @GetMapping(value = "/captcha",produces = "image/jpeg")
  public void captcha(HttpServletRequest request, HttpServletResponse response) {
    // 定义response输出类型为image/jpeg类型
    response.setDateHeader("Expires", 0);
    // Set standard HTTP/1.1 no-cache headers.
    response.setHeader("Cache-Control", "no-store, no-cache, mustrevalidate");
    // Set IE extended HTTP/1.1 no-cache headers (use addHeader).
    response.addHeader("Cache-Control", "post-check=0, pre-check=0");
    // Set standard HTTP/1.0 no-cache header.
    response.setHeader("Pragma", "no-cache");
    // return a jpeg
    response.setContentType("image/jpeg");

    //-------------------生成验证码 begin --------------------------

    // 获取验证码的文本内容
    String text = defaultKaptcha.createText();
    System.out.println("验证码内容：" + text);
    // 将文本内容放入session
    request.getSession().setAttribute("captcha", text);
    // 图形验证码
    BufferedImage image = defaultKaptcha.createImage(text);
    ServletOutputStream outputStream = null;
    try {
      outputStream = response.getOutputStream();
      // 输出流输出图片，格式为jpg
      ImageIO.write(image, "jpg", outputStream);
      outputStream.flush();
    } catch (IOException e) {
      e.printStackTrace();
    } finally {
      if (outputStream!=null) {
        try {
          outputStream.close();
        } catch (IOException e) {
          e.printStackTrace();
        }
      }

    }
  }

}
